prerequisites.md

@@ -3,15 +3,30 @@
 ICoVeR is designed and implemented as a regular [R](http://www.r-project.org/)  package. This guide was tested with  [R](http://www.r-project.org/) v3.2.0 and [RStudio](http://www.rstudio.com/) v0.98.1102. Newer versions should work, please report any problems at the LIST [ICoVeR github page](https://git.list.lu/eScience/ICoVeR/). Further more, a modern browser is required. We have had most convenient experience with Chrome, but recent versions of Firefox worked as well.
 
 To run our interactive interface, the OpenCPU R-package must be installed. To this end run the following command in R or RStudio.
-N.B. the ">" symbol  indicates the command prompt and should not be typed
+
+N.B. some users who have their default R library location stored on a network drive have reported issues with installing the application.
+If this is a case the solution is to set another local folder as the location for storing installed libraries.
+To set another  location for installing packages , for example ```c:\R_libs``` use the following command 
+
+```
+.libPaths("c:/R_libs")
+´´´
+
+N.B. the ">" symbol  indicates the command prompt and should not be typed.
+
+
 ```
 # Bioconductor is required for the preprocessing of the fasta files
-> source("http://bioconductor.org/biocLite.R")
+ source("http://bioconductor.org/biocLite.R")
 > biocLite("Biostrings")
 
 # OpenCPU is required to run the interactive binning tool
 > install.packages("opencpu")
 
+# The packages FactoMiner and Hmisc should be preinstalled
+>install.packages("FactoMineR")
+>install.packages("Hmisc")
+
 # devtools is required to install the interactive binning tool
 > install.packages("devtools")
 ```